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首页> 外文期刊>Tropical Ecology >Impacts of selective logging on diversity, species composition and biomass of residual lowland dipterocarp forest in central Western Ghats, India
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Impacts of selective logging on diversity, species composition and biomass of residual lowland dipterocarp forest in central Western Ghats, India

机译：选择性测井对印度中部地球中部剩余低地Dipterocarp森林的多样性，物种组成和生物质的影响

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摘要

Studies on the residual impact of logging on the diversity and composition of tropical forests are scarce in India. We examined the impact of selective logging on tree species richness, composition and structure prevalent after 27 years. Trees >= 30 cm girth at breast height were inventoried in four 1 ha plots in selectively logged patches and two 1 ha plots in an adjacent unlogged patch of lowland dipterocarp forest continuum, Uppangala, central Western Ghats, India. We enumerated 2343 trees (598 trees ha(-1)) belonging to 116 species (63 species ha(-1)) and 1345 trees (672 trees ha(-1)) belonging to 68 species (55 species ha(-1)) in logged and unlogged plots, respectively. The species richness in logged plots as compared to unlogged plots varied with spatial scale of sampling: at 1 ha scale two logged plots had higher species richness whereas it was high in only one plot at 400 m(2) scale. Logged plots had low floristic similarity between them and also with the unlogged plots. Mantel and partial Mantel tests proved that logging was the main driver for the species composition rather than the elevation and spatial distance. Higher abundance of species belonging to canopy, intermediate and light wood categories and lower density of emergent, understory and medium wood types were recorded in the logged plots. As compared to unlogged plots, logged plots had 20-59% less above ground biomass (AGB) due to paucity of larger trees, especially in the emergent and medium wood types but higher AGB in canopy and hardwood categories. Our study shows the residual impact of logging even after 27 years and suggests that the recovery process may depend on the resurgence of emergent and medium wood categories.
机译：对印度的伐木对伐木的剩余影响和组成的研究是稀缺的。我们检查了27岁后选择性测井对树种的影响，组成和结构普遍存在。树木> = 30厘米的乳房高度在四个1公顷地块中，在选择性地记录的斑块中，在印度的邻近解锁的别人的邻近解锁果断中有两个1公顷的地块。我们列举了2343棵树（598棵树HA（-1））属于116种（63种HA（-1））和1345棵树（672棵树HA（-1）），属于68种（55种HA（-1） ）分别在记录和未完成的图中。与未完成的图表相比，Logged Plots中的物种丰富的曲线与抽样的空间尺度变化：在1公顷尺度上，两个记录的图具有更高的物种丰富，而其在400米（2）尺度下只有一个曲线。记录的图在它们之间具有低的植度相似性，也是未完成的图。 Mantel和部分壁炉式测试证明，测井是物种组成的主要驱动器，而不是高程和空间距离。记录在记录的地块中记录了较高丰富的属于树冠，中间和轻型木材类别，中间和轻型木材类别和较低的紧急情况，林下和中木材类型。与未完成的绘图相比，由于较大的树木的缺乏，记录的图在地面生物量（AGB）上较少20-59％，特别是在突出和中式木材类型中，但在Canopy和硬木类别中的agb更高。我们的研究表明，即使在27年之后，伐木的剩余影响也表明恢复过程可能取决于紧急和中学类别的复苏。

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